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Submarine K-7 (SS-38) with Union Iron Works in the background on 3 October 1914.

USN photo courtesy of Darryl L. Baker.

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Submarine K-7 (SS-38) on trials on 3 October 1914. She is likely in San Francisco Bay.

USN photo courtesy of Darryl L. Baker.

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Exterior conning station and periscopes of the K-7 (SS-38).
These long and short walk-around, five-inch diameter periscopes were both manufactured by the Electric Boat Company and installed in May 1915. The photograph was probably taken at about that time.

U.S. Naval Historical Center Photograph, NH 52397.

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Exterior conning station and periscopes of the K-7 (SS-38).
These long and short walk-around, five-inch diameter periscopes were both manufactured by the Electric Boat Company and installed in May 1915. The photograph was probably taken at about that time. The unidentified submarine in the immediate foreground appears to have smaller-diameter periscopes, with taller sheers to support them.

U.S. Naval Historical Center Photograph, NH 52398.

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Submarines K-3 (SS-34), K-4 (SS-35), K-7 (SS-38) and K-8 (SS-39) were in Mare Island's dry dock #1 from 17 June to 18 August 1915 preparing for their trip to Hawaii. In this photo the stern of K-7 (left) and K-4 (right) are seen in the foreground while the sterns of K-8 (left) and K-3 (right) are seen in the background. This photo was taken from near the end of the dry dock.

USN photo courtesy of Darryl L. Baker.

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Submarines K-3 (SS-34), K-4 (SS-35), K-7 (SS-38) and K-8 (SS-39) were in Mare Island's dry dock #1 from 17 June to 18 August 1915 preparing for their trip to Hawaii. In this photo the bow of K-3 (left) and K-8 (right) are seen in the foreground while the bow of K-4 (left) and K-7 (right) are seen in the background. This photo was taken from head of the dry dock.

USN photo courtesy of Darryl L. Baker.

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Submarine K-7 (SS-38) in Hawaii on 14 October 1915. Note the broom on her mast. As the story goes she was the only one of her sister subs to make the run from Mare Island to Hawaii in a continuous run.

USN photo courtesy of Darryl L. Baker.

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Sea Wasps to Guard Harbor HereK-7 (SS-38) Comes In With New Broom Tied To MastheadIs First of New Flotilla to Dock at Honolulu. K-3 (SS-34) Second to Enter Harbor

Image and text provided by University of Hawaii at Manoa; Honolulu, HI.Photo from the Honolulu Star-Bulletin. (Honolulu [Oahu, Hawaii) 1912-current, 14 October 1915, 3:30 Edition, Image 2, courtesy of chroniclingamerica.loc.gov.

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From outboard to inboard, what looks to be K-8 (SS-39), K-4 (SS-35), K-3 (SS-34) & K-7 (SS-38), at Pearl Harbor, Territory of Hawaii on the 14 of October, 1915.

USN photo from NARA, courtesy of Daniel Dunham.

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One Mashed Finger Only Accident of Submarine VoyageK submarine ploughing through open sea; showing deck structure of K class boats.

K Submarines in Port After Long VoyageThis is the way the K submarines looked as they glided to their dock in the navy slip Thursday afternoon, completing their run of 2,180 miles from San Francisco to this port under their own power-a big feat performed in a big way, and adding fresh laurels to the American navy.In the upper picture is shown the K-8 (SS-39) slowing down as she entered the slip, the last of the four submersible to complete the voyage. The lower view shows the K-3 (SS-34) in the foreground, another K boat and the F-1 (SS-20), F-2 (SS-21), & F-3 (SS-22) in the background.

Image and text provided by University of Hawaii at Manoa; Honolulu, HI.Photo from the Honolulu Star-Bulletin. (Honolulu [Oahu, Hawaii) 1912-current, 16 October 1915, 3:30 Edition, Image 17, courtesy of chroniclingamerica.loc.gov.

The S-1 (SS-105) with a Martin MS-1 scouting seaplane (Bureau # A-6525) on her after deck, during the mid-1920s. Among the submarines docked in the background is K-7 (SS-38), at left. Original photo caption gives location as New London, Connecticut. However, the view may have been taken at Norfolk or Hampton Roads, Virginia.

Article stating that the engine from a K Class Sub scraped in Philadelphia [that would be either K-7 (SS-38) or K-8 (SS-39)} was being repaired to be used on YG-16 being built at Mare Island.

Article courtesy of Darryl L. Baker.

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UNITED STATES submarines in drydock at the Navy Yard. The wonders of League Island will be open to the public today for the navy relief-day celebration. Visitors will have an opportunity to see the great changes that have taken place in the Navy Yard.K-5 (SS-36), K-7 (SS-38), K-8 underwent overhaul before sailing 10 November for Key West.

One of the mother ships of Uncle Sam's navy the Camden (AS-6), and her nine undersea kittens, a formidable fotilla of Yankee submarines that have been a source of great interest the last two weeks to visitors to the Atlantic Fleet at anchor in the Hudson. The Camden and her family have been at anchor off the Seventies. Above. How the K-5 (SS-36) looks when traveling at full speed on the surface.

There are fewer busier places in Philadelphia than the large drydock at the Philadelphia Navy Yard, where repairs are being made on eleven of Uncle Sam's submarine craft.Among the boats visible is the K-1 (SS-32), which appears in the front left corner, and K-5 (SS-36), behind her. The remainder of the K-boats are likely here as well.

Image and text provided by Penn State University Libraries; University Park, PA. Photo from the Evening Public Ledger. (Philadelphia [Pa.]) 1914-1942, 14 October 1920, NIGHT EXTRA, Image 26, courtesy of chroniclingamerica.loc.gov

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Submarine being overhauled, Philadelphia Navy Yard drydock, 19 March 1929. The boats might be K-boats, with one Lake design N-class.